Questions on UI for WPF Forum

1 answer

132 views

Hello!

Is it possible to collapse empty space in my RadRibbonBackstage?

<telerik:RadRibbonView.Backstage>

<telerik:RadRibbonBackstage HorizontalContentAlignment="Left" ScrollViewer.VerticalScrollBarVisibility="Disabled" ScrollViewer.HorizontalScrollBarVisibility="Disabled">

<telerik:RadRibbonBackstageItem Header="...">

<controls:InventoryControl DataContext="{Binding Path=...}"/>

</telerik:RadRibbonBackstageItem>

...

</telerik:RadRibbonBackstage>

</telerik:RadRibbonView.Backstage>

My version is 2021.1.325.45.

RibbonView and RibbonWindow

answered on 27 Apr 2021

5 answers

975 views

How to do multiple checkbox in gridview.

Hello.

In the grid view, the selection unit is set to 'FullRow' and the selection mode is set to 'Extended'.

I want to know how to make a checkbox column and do multi-check.(Refer to the image)

Using GridViewSelectColumn will do something similar.

However, It is immediately reflected when selecting a row and does not support binding.

And I have to keep the checkbox variable when I close or open the window.

So I try to use GridViewCheckBoxColumn.

Anotherway is to put CellTemplate in GridViewDataColumn and do EventBindings, but the logic is not correct.

<telerik:RadGridView Margin="10 0" Width="300"

ItemsSource="{Binding Rooms}"

behaviour:GridViewMultiSelection.SelectedItems = "{Binding RoomItems}"

SelectionUnit="FullRow"

SelectionMode="Extended"

AutoGenerateColumns="False"

ShowColumnHeaders="True"

ShowGroupFooters="False"

ShowGroupPanel="False"

RowIndicatorVisibility="Collapsed"

RowDetailsVisibilityMode="Visible"

EnableColumnVirtualization="True"

EnableRowVirtualization="True"

VirtualizingPanel.IsVirtualizing="True"

ScrollViewer.HorizontalScrollBarVisibility ="Auto"

ScrollViewer.VerticalScrollBarVisibility ="Auto"

FrozenColumnsSplitterVisibility="Collapsed"

IsFilteringAllowed="False"

AutoExpandGroups="False"

>

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name" Width="*" IsReadOnly="True" DataMemberBinding="{Binding Name}" />

<telerik:GridViewDataColumn Header="ID" Width="0.7*" IsReadOnly="True" DataMemberBinding="{Binding Id}" IsVisible="False"/>

<!--<telerik:GridViewDataColumn DataMemberBinding="{Binding IsChecked}" Header="Verification" Width="75" >

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<CheckBox IsChecked="{Binding IsExcept}">

<telerik:EventToCommandBehavior.EventBindings>

<telerik:EventBinding EventName="Checked"

Command="{Binding RelativeSource={RelativeSource AncestorType=telerik:RadGridView}, Path=DataContext.OnCheckedCommand}" />

</telerik:EventToCommandBehavior.EventBindings>

</CheckBox>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>-->

<telerik:GridViewCheckBoxColumn Header="Verification" Width="75" DataMemberBinding="{Binding IsChecked}"

IsReadOnly="False" EditTriggers="CellClick" AutoSelectOnEdit="True" IsThreeState="False" >

</telerik:GridViewCheckBoxColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

If the above problem is not solved, is there a way to keep the variable when closing or opening the window using GridViewSelectColumn?

Thanks.

GridView

answered on 27 Apr 2021

6 answers

337 views

Cannot find Project Configuration Wizard

Hey. I already had a license. But I cannot find the Project Configuration Wizard in my VS 2019 Extensions. Here is the screenshot.

Installer and Visual Studio Extensions

answered on 26 Apr 2021

0 answers

236 views

What is the difference between RowStyle and RowStyleSelector?

Hello.

I am trying to change a specific background color of a row in a GridView.

Here, I used rowstyle and RowStyleSelector to see that the color has changed. (Both apply)

(My function) Clicking the button checks the GridView Row and changes the background color of only the matching values.

Both work when you up or down the mouse wheel. I think this is not efficient for me.

I know that RowStyle uses Convert and RowSelector overrides Style SelectStyle.

Is this just the difference? Or what is the performance efficiency that is good when using my function?

Thanks.

GridView

asked on 26 Apr 2021

5 answers

1.3K+ views

GridView DoubleClick MVVM

Hi there,

In this link http://www.telerik.com/community/code-library/wpf/general/mvvm-context-amp-row-doubleclick-functionality.aspx, it is using the CommandBindingBehavior to bind the MouseDoubleClick event. The Problem is the the even fires when dbl clicking the header or scrollbar.

How can I make it fire when the actual row or cell is double clicked?

Thanks!

May

GridView

answered on 25 Apr 2021

1 answer

192 views

Binding doesn't work normally

Hi.

I think I have a problem with binding.

I use a RadGridView with 3 columns and binding. I set DataContext in code behind and use it in binding here.

I also use TextBlockWithSearchProperty. It's common TextBlock with my custom property SearchText, it works normally.

The problem is that GridView create a few TextBlockWithSearchProperty objects and view works normal. I can see a data that I show in view, but in code behind property Text (TextBlockWithSearchProperty) is equal to "" and DataContext is equal to null. I don't understand why?

How can I fix it? Or what I do wrong?

<telerik:RadGridView Name="GridView" Margin="5"
AutoGenerateColumns="False" ItemsSource="{Binding Path=SelecteDay.Items}">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Time"

DataMemberBinding="{Binding Time, StringFormat=\{0:hh\\:mm\}}"
CellEditTemplate="{StaticResource TimePicker}" Width="100" />

<telerik:GridViewDataColumn Header="Text" x:Name="TextColumn"
DataMemberBinding="{Binding Text, UpdateSourceTrigger=PropertyChanged}"
Width="*" IsFilterable="True" FilterMemberPath="Text">

<telerik:GridViewDataColumn.CellTemplate>
<DataTemplate >
<infrastructure:TextBlockWithSearchProperty Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
SearchText="{Binding RelativeSource={RelativeSource AncestorType={x:Type telerik:RadGridView}}, Path=DataContext.SearchText, Mode=OneWay}"
d:DataContext="{Binding}" />
</DataTemplate>
</telerik:GridViewDataColumn.CellTemplate>
</telerik:GridViewDataColumn>
</telerik:RadGridView.Columns>

</telerik:RadGridView>

GridView

answered on 25 Apr 2021

4 answers

427 views

Balloon notifications not visible

Hello,

I'm using the Progress Telerik UI for WFP sample application (R1 2021 SP1) to review the capabilities of RadNotifyIcon.

Unfortunately, the balloon features are not working at all for me. For example, navigating to the "Notify Icon Configurator" sample app, the "Show balloon" and "Hide balloon" both do nothing.

Everything else seems fine - the icon is visible, and the popup features are working. Just the balloon messages are not.

I'm running the latest build of Windows 10 with two 4k monitors are 200% scaling.

Any thoughts on a fix or workaround would be appreciated.

- Mark R.

NotifyIcon

answered on 23 Apr 2021

6 answers

1.2K+ views

Bind Datatable with RadGridView

Hi,

I am new to WPF, I am using MVVM pattern in WPF and generating a Datatable structure at the runtime, then binding Datatable with RadGridView, which is working as expected.

Problem: I want RadGridView configurable (where user can add new row, delete row and edit the data) and on save button click everything should be saved in the database. I am able to bind existing data from the Datatable to RadGridView, but not able to edit, delete or add new rows. I have set "True" value for CanUserDeleteRows and CanUserInsertRows. I am not sure where I am going wrong.

In one of the Telerik blog, I read that we should bind Dataview to RadGridView (as Dataview inplements INotifyPropertyChanged), but if I do that then my RadGridView appears to be empty everytime (not even show coloumns).

Any help will be highly appreciated.

Thanks in advance!

GridView

answered on 23 Apr 2021

2 answers

250 views

WPF with XAML and VB and ARIA

Hello Community.

Is it possible to use Telerik UI with ARIA for WPF / XAML / VB without using ASP.NET or Silverlight?

We're looking for a solution to read ARIA tags with JAWS Screen Reader from a Desktop Application.

Greetings

Jürgen

General Discussions

answered on 23 Apr 2021

2 answers

236 views

System.Null ReferenceException in RadTreeView

Hi Team,

We are facing the below exception in our applicaiton. Currently we are using version 4.0 telerik radtreeview in our application . can you please confirm whether it is related version issue or any other reason and How to resolve this issue?

Stack Trace:
Timestamp: 3/23/2021 15:58:17           Message: HandlingInstanceID: c392afd7-c81e-4acf-86d3-2bc248a1b9ab
An exception of type 'System.NullReferenceException' occurred and was caught.
-----------------------------------------------------------------------------
03/23/2021 11:58:17
Type : System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Message : AUID = 724 - Object reference not set to an instance of an object.
Source : PresentationFramework
Help link :
Data : System.Collections.ListDictionaryInternal
TargetSite : Void Remove(System.Windows.Controls.Primitives.GeneratorPosition, Int32, Boolean)
HResult : -2147467261
Stack Trace :    at System.Windows.Controls.ItemContainerGenerator.Remove(GeneratorPosition position, Int32 count, Boolean isRecycling)
   at Telerik.Windows.Controls.TreeView.TreeViewPanel.CleanupRange(IList children, IItemContainerGenerator generator, Int32 startIndex, Int32 count)
   at Telerik.Windows.Controls.TreeView.TreeViewPanel.CleanupContainers(Int32 firstViewport, ItemsControl itemsControl)
   at Telerik.Windows.Controls.TreeView.TreeViewPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at Telerik.Windows.Controls.RadTreeViewItem.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at Telerik.Windows.Controls.TreeView.TreeViewPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Thanks,

Srinivasan

TreeView

answered on 23 Apr 2021